基于航炮电发火机构的工作原理,分析了使用贝叶斯网络进行综合决策的知识表示问题,通过具体实例说明了故障原因分析的过程。基于单片机和数字信号处理技术,给出了各型航炮电发火机构通用检测仪及其接口电路的设计方法。采用数字调压和模块化电路设计方法,提高了测量精度和功能扩展能力;引入自适应电势消除回路,消除了自感电势对测试电路的影响。最后给出了通用检测仪硬件设计方法和软件工作流程。 Based on the working principle of the avionics firing mechanism, the knowledge representation of the comprehensive decision making using Bayesian network is analyzed. The process of failure analysis is illustrated by a concrete example. Based on the single-chip microcomputer and digital signal processing technology, the design method of universal detector and its interface circuit for various types of navigational fire armament is given. Adopt digital voltage regulation and modular circuit design method to improve the measurement accuracy and function expansion capability; the introduction of adaptive potential cancellation circuit, eliminating the self-inductance potential of the test circuit. Finally, the general detector hardware design method and software workflow are given.